bay area weather 7 hours ago Forecast: Last hot day Meteorologist Kari Hall has a look at cooler weather ahead and the warmer weekend outlook in the Microclimate Forecast. US & World Videos 3:30 Jeff's forecast: What's causing a huge temperature drop 2:54 National Weather Service upgrades its radar systems 2:23 Kari's forecast: Last hot day 2:51 Jeff's forecast: Quick warming as inland heat continues and what drops temps mid-week 3:39 Jeff's Forecast: Tracking 2 systems to drop temps by mid-week